Macmillan Learning A 210.2 ng sample of an unknown radioactive substance was placed in storage and its mass measured periodically. After 47 days the amount of radioactive substance had decreased to 26.28 ng. How many half-lives of the unknown radioactive substance have occurred? number of half-lives: half-lives
Macmillan Learning A 210.2 ng sample of an unknown radioactive substance was placed in storage and its mass measured periodically. After 47 days the amount of radioactive substance had decreased to 26.28 ng. How many half-lives of the unknown radioactive substance have occurred? number of half-lives: half-lives
Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter18: Nuclear Chemistry
Section: Chapter Questions
Problem 18.BCP
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![Macmillan l
30:
F2
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A 210.2 ng sample of an unknown radioactive substance was placed in storage and its mass measured periodically. After
47 days the amount of radioactive substance had decreased to 26.28 ng. How many half-lives of the unknown radioactive
substance have occurred?
number of half-lives:
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Transcribed Image Text:Macmillan l
30:
F2
W
S
A 210.2 ng sample of an unknown radioactive substance was placed in storage and its mass measured periodically. After
47 days the amount of radioactive substance had decreased to 26.28 ng. How many half-lives of the unknown radioactive
substance have occurred?
number of half-lives:
#3
H
80
F3
mmand
E
D
A GA
$
X C
4
OOD
886
F4
R
F
%
от ото
5
V
F5
T
G
^
6
B
F6
Y
&
7
H
8
F7
U
N
00 *
8
DII
FB
J
L
-
(
9
M
K
DD
F9
O
<
I
H
db
-O
L
4
F10
P
command
>
. V
-
...
I
4
F11
{
[
option
+
=
?
11
1
F12
}
]
half-lives
delete
return
st
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